LEGRAND VR61-18 Manuel De L'utilisateur page 54

Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
Alarm
Description
Possible
causes
Solutions
54 OMP06145 REV. D
UPS user manual
Manuel de l'utilisateur de l'ASI
Utilizzo dell'UPS
A30 COMMON ALARM
Common alarm.
➢ At least one alarm is present.
1. Check which alarms are present and carry out the indicated
procedures.
A31 MBCB BUS CLOSED
The manual bypass isolator is closed.
➢ Manual bypass isolator closed.
1. Check the status of the manual bypass isolator.
2. Check the functionality of the auxiliary contact of the isolator.
3. If the alarm persists, contact our Technical Support Service.
A32 EPO BUS CLOSED
The system is blocked due to the activation of the emergency power off
button.
➢ Activation of the (local or remote) emergency power off button.
1. Release the emergency power off button and reset the alarm.
2. If the alarm persists, contact our Technical Support Service.
A33 ASYMMETRIC LOAD
The positive and negative voltages measured on the DC capacitors
towards the middle point are different.
➢ Possible failure on the measuring circuit.
➢ Possible fault of DC capacitors.
1. Reset the system.
2. If the alarm persists, contact our Technical Support Service.
A34 SERVICE REQUIRED
A UPS check is necessary.
➢ Possible UPS fault.
1. If the alarm persists, contact our Technical Support Service.